Isolation type electromagnetic valve

Abstract

The utility model discloses an isolation type electromagnetic valve, which comprises a valve body, a valve core, an electromagnetic valve core and an electromagnetic valve core, the electromagnetic device is arranged at the top of the valve body and comprises an iron core shell, the iron core shell is communicated with the cavity of the valve body, a fixed iron core and a movable iron core are arranged in the iron core shell, and the movable iron core can transversely move in the cavity of the iron core shell; the reset spring is arranged between the opposite end surfaces of the fixed iron core and the movable iron core; the upper end of the movable block is connected with the movable iron core, the movable block moves along with the movable iron core, and the lower end of the movable block extends into the cavity of the valve body; the soft isolation sleeve is arranged in the cavity of the valve body in a sleeving mode, the soft isolation sleeve wraps the lower end of the moving block, and the lower portion of the soft isolation sleeve deforms along with displacement of the moving block; according to the isolation type electromagnetic valve, the moving block is wrapped by the soft isolation sleeve, fluid and internal elements of an electromagnetic device are thoroughly isolated, corrosion of corrosive media is avoided, the service life is prolonged, the lower portion of the soft isolation sleeve is deformed along with displacement of the moving block, dynamic sealing is achieved, and working condition switching of a fluid inlet is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control technical field, concretely relates to a kind of isolation solenoid valve for realizing double-channel switching by electromagnetic drive. BACKGROUND

[0002] Traditional solenoid valve adopts the sealing mode of metal valve core and valve seat direct contact, for example plunger solenoid valve, diaphragm solenoid valve etc..Its typical structure includes electromagnetic drive assembly, reset spring and fluid passage switching mechanism, and valve core is moved by electromagnetic force to realize the opening / closure of different channels.

[0003] The prior art has the following defects:

[0004] 1. Insufficient isolation: valve core is directly contacted with fluid, which is easy to cause corrosion of internal elements (such as iron core and spring) of electromagnetic device by corrosive fluid, thereby shortening the service life.

[0005] 2. Reset deviation: reset spring is easy to deform under long-term fluid impact, which causes the deviation of reset position of moving iron core and leads to sealing failure or jamming problem.

[0006] In summary, there is an urgent need to develop an isolation solenoid valve. UTILITY MODEL CONTENT

[0007] In view of the deficiencies of the prior art, the utility model provides an isolation solenoid valve, which realizes the physical isolation of electromagnetic device and fluid passage and avoids the corrosion of internal elements by fluid.

[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions:

[0009] An isolation solenoid valve comprises:

[0010] a valve body having a three-channel structure including a first fluid inlet, a second fluid inlet and an outlet;

[0011] an electromagnetic device arranged at the top of the valve body, wherein the electromagnetic device comprises an iron core shell, the iron core shell is in communication with the cavity of the valve body, the iron core shell is internally provided with a fixed iron core and a moving iron core, and the moving iron core can move horizontally in the cavity of the iron core shell;

[0012] a reset spring arranged between the opposite end faces of the fixed iron core and the moving iron core;

[0013] a moving block, wherein the upper end of the moving block is connected with the moving iron core, the moving block moves with the moving iron core, and the lower end of the moving block extends into the cavity of the valve body;

[0014] a soft isolation sleeve, wherein the soft isolation sleeve is arranged in the cavity of the valve body, the lower end of the moving block is wrapped by the soft isolation sleeve, and the lower part of the soft isolation sleeve deforms with the displacement of the moving block to realize dynamic sealing.

[0015] The electromagnetic device is energized, the moving iron core is moved horizontally to the fixed iron core under the magnetic force, the moving block is driven to move synchronously, the soft isolation sleeve blocks the first fluid inlet in the valve body cavity, and the second fluid inlet of the valve body is in communication; the electromagnetic device is de-energized, the reset spring pushes the moving iron core to reset, the moving block is driven to move synchronously, the soft isolation sleeve blocks the second fluid inlet in the valve body cavity, and the first fluid inlet is in communication.

[0016] Further, the isolation type electromagnetic valve further comprises a positioning pin connected to the opposite end surface of the fixed iron core and the moving iron core (23), and the reset spring is sleeved outside the positioning pin

[0017] Further, the isolation type electromagnetic valve further comprises a positioning ring threadedly connected in the iron core shell, and the positioning ring cooperates with the positioning pin to ensure that the moving iron core is always positioned at the axial center of the iron core shell.

[0018] Further, the moving iron core is provided with an annular groove on the outer side, the annular groove is matched with the shape of the upper end of the moving block, the upper end of the moving block is clamped into the annular groove, and the moving block is driven to move horizontally through the annular groove of the moving iron core.

[0019] Further, the moving block is provided with a protruding block extending outward in the middle section, the protruding block is clamped into the assembly groove of the upper cover of the valve body, and the protruding block and the assembly groove cooperatively form a fulcrum of the moving block.

[0020] Further, the soft isolation sleeve is provided with an annular hanging edge on the upper part, the annular hanging edge is in interference fit with the hanging table of the upper cover of the valve body to form a static seal, and the lower part of the soft isolation sleeve is matched with the shape of the lower end of the moving block.

[0021] Compared with the prior art, the isolation type electromagnetic valve has the following beneficial effects:

[0022] The isolation type electromagnetic valve is provided by electromagnetic driving to realize double-channel switching, comprising a valve body, an electromagnetic device, a reset spring, a moving block and a soft isolation sleeve; the electromagnetic device comprises an iron core shell communicated with a cavity of the valve body, the iron core shell is internally provided with a fixed iron core and a moving iron core; the reset spring is arranged between the opposite end surfaces of the fixed iron core and the moving iron core; the upper end of the moving block is connected with the moving iron core, the moving block moves with the moving iron core, and the lower end of the moving block extends into the cavity of the valve body; the soft isolation sleeve is arranged in the cavity of the valve body, and the soft isolation sleeve wraps the lower end of the moving block. Through the above scheme design, the moving block is wrapped by the soft isolation sleeve, the fluid and the internal elements of the electromagnetic device are completely isolated, the corrosion of corrosive medium is avoided, the service life is prolonged, the lower part of the soft isolation sleeve deforms with the displacement of the moving block, dynamic sealing is realized, and the working condition switching of the fluid inlet is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1A perspective view of the isolation type electromagnetic valve is shown.

[0024] Figure 2 A sectional view of the isolation type electromagnetic valve is shown.

[0025] Figure 3 A perspective view of the isolation type electromagnetic valve is shown. Figure 2

[0026] Figure 4 An exploded assembly view of the isolation type electromagnetic valve is shown.

[0027] Figure 5 An assembly view of the valve body and the moving block is shown.

[0028] Figure 6 An assembly view of the moving block and the soft isolation sleeve is shown.

[0029] In the figure: 1, valve body; 2, electromagnetic device; 3, reset spring; 4, moving block; 5, soft isolation sleeve; 6, positioning pin; 7, positioning ring; 11, first fluid inlet; 12, second fluid inlet; 13, outlet; 14, valve body upper cover; 21, core shell; 22, fixed core; 23, moving core; 41, protrusion; 51, annular hanging edge; 141, assembly groove; 142, hanging table; 231, annular groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] Referring to Figures 1-6 The present application provides a technical solution: an isolation type electromagnetic valve, comprising:

[0032] The valve body 1 is a three-channel structure comprising a first fluid inlet 11, a second fluid inlet 12, and an outlet 13;

[0033] The electromagnetic device 2 is arranged on the top of the valve body 1, and the electromagnetic device 2 comprises a core shell 21, the core shell 21 is in communication with the cavity of the valve body 1, and the core shell 21 is internally provided with a fixed core 22 and a moving core 23, the moving core 23 can move transversely in the cavity of the core shell 21;

[0034] The reset spring 3 is arranged between the opposite end faces of the fixed core 22 and the moving core 23;

[0035] ​The moving block 4 is connected with the moving iron core 23 at the upper end of the moving block 4, and the moving block 4 moves with the moving iron core 23; the lower end of the moving block 4 extends into the cavity of the valve body 1;

[0036] The soft isolation sleeve 5 is arranged in the cavity of the valve body 1, and the soft isolation sleeve 5 wraps the lower end of the moving block 4; the lower part of the soft isolation sleeve 5 deforms with the displacement of the moving block 4, thereby achieving dynamic sealing.

[0037] When the electromagnetic device 2 is powered on, the moving iron core 23 is laterally displaced towards the fixed iron core 22 under the action of the magnetic force, thereby driving the moving block 4 to synchronously displace, and the soft isolation sleeve 5 blocks the first fluid inlet in the cavity of the valve body 1, and the second fluid inlet in the cavity of the valve body 1 is in communication; when the electromagnetic device 2 is powered off, the reset spring 3 pushes the moving iron core 23 to reset, thereby driving the moving block 4 to synchronously displace, and the soft isolation sleeve 5 blocks the second fluid inlet in the cavity of the valve body 1, and the first fluid inlet is restored to communication.

[0038] The isolation type electromagnetic valve completely isolates the fluid from the internal elements of the electromagnetic device 2 by wrapping the moving block 4 with the soft isolation sleeve 5, thereby avoiding the corrosion of corrosive medium and prolonging the service life; the lower part of the soft isolation sleeve 5 deforms with the displacement of the moving block 4, thereby achieving dynamic sealing and switching the working conditions of the fluid inlet.

[0039] As shown in Figure 2 , the isolation type electromagnetic valve further comprises a positioning pin 6 connected to the opposite end faces of the fixed iron core 22 and the moving iron core 23; the reset spring 3 is sleeved outside the positioning pin 6, and the positioning pin 6 penetrates through the reset spring 3, thereby limiting the radial deviation of the reset spring 3.

[0040] As shown in Figures 1-2 and Figure 4 , the isolation type electromagnetic valve further comprises a positioning ring 7 threadedly connected in the iron core shell 21; the positioning ring 7 cooperates with the positioning pin 6 to ensure that the moving iron core 23 is always located at the axial center of the iron core shell 21, thereby avoiding jamming and eliminating the risk of deviation of the moving iron core 23, improving the forward displacement and reset accuracy of the moving iron core 23; the threaded connection design of the positioning ring 7 facilitates the adjustment of the initial position of the moving iron core 23, thereby improving the assembly efficiency.

[0041] As shown in Figures 2-3 , the moving iron core 23 is provided with an annular groove 231 on the outer side; the annular groove 231 is matched with the shape of the upper end of the moving block 4; the upper end of the moving block 4 is clamped into the annular groove 231; the moving block 4 is driven to synchronously displace by the annular groove 231 of the moving iron core.

[0042] As shown in Figures 4-6 , the middle segment of the moving block 4 is provided with a protrusion 41 extending outward; the protrusion 41 is clamped into the assembly groove 141 of the valve body upper cover 14; the protrusion 41 cooperates with the assembly groove 141 to form a fulcrum of the moving block 4, thereby enabling the moving block 4 to move stably and reducing the swing amplitude.

[0043] Referring to Figure 3 , Figure 6 As shown in the drawings, the upper portion of the soft isolation sleeve 5 is provided with an annular hanging edge 51, which is in interference fit with the hanging table 142 of the valve body upper cover 14 to form a static seal, preventing the fluid in the valve body 1 from flowing into the core shell 21, and achieving physical isolation of the electromagnetic device and the fluid. The lower portion of the soft isolation sleeve 5 is shaped to match the lower end of the moving block 4, and the lower portion of the soft isolation sleeve 5 deforms with the displacement of the moving block 4 to achieve dynamic sealing and flow path switching.

[0044] The soft isolation sleeve 5 of the embodiment is made of rubber or silicone material, which is suitable for small unevenness of the valve port, reduces wear, and is suitable for high-frequency switching working conditions.

[0045] Working principle: The electromagnetic device 2 is energized, the moving iron core 23 is transversely displaced under the action of magnetic force towards the fixed iron core 22, driving the moving block 4 to displace synchronously, so that the soft isolation sleeve 5 blocks the first fluid inlet 11 in the valve body 1 cavity, at this time the second fluid inlet 12 in the valve body 1 cavity is in conduction; the electromagnetic device 2 is de-energized, the reset spring 3 pushes the moving iron core 23 to reset, driving the moving block 4 to displace synchronously, so that the soft isolation sleeve 5 blocks the second fluid inlet 12 in the valve body 1 cavity, at this time the first fluid inlet 11 restores conduction. Through electromagnetic drive, double-channel switching is achieved, and physical isolation of the electromagnetic device and the fluid channel is achieved, avoiding fluid erosion of internal components.

Claims

1. A hermetic electromagnetic valve characterized by comprising: The utility model relates to a three-way valve, comprising: a valve body (1) having a three-way structure; an electromagnetic device (2) disposed on the top of the valve body (1), the electromagnetic device (2) comprising a core shell (21) in communication with the cavity of the valve body (1), the core shell (21) having a fixed core (22) and a moving core (23) disposed inside, the moving core (23) being able to move laterally in the cavity of the core shell (21); a reset spring (3) disposed between the opposite end faces of the fixed core (22) and the moving core (23); a moving block (4) having an upper end connected to the moving core (23), the moving block (4) moving with the moving core (23), the lower end of the moving block (4) extending into the cavity of the valve body (1); a soft isolation sleeve (5) disposed in the cavity of the valve body (1) and wrapping the lower end of the moving block (4), the lower part of the soft isolation sleeve (5) deforming to achieve dynamic sealing when the moving block (4) moves; when the electromagnetic device (2) is powered on, the moving core (23) moves laterally towards the fixed core (22) under the action of magnetic force, driving the moving block (4) to move synchronously, so that the soft isolation sleeve (5) blocks the first fluid inlet in the cavity of the valve body (1), and the second fluid inlet of the valve body (1) is in communication; when the electromagnetic device (2) is powered off, the reset spring (3) pushes the moving core (23) to reset, driving the moving block (4) to move synchronously, so that the soft isolation sleeve (5) blocks the second fluid inlet in the cavity of the valve body (1), and the first fluid inlet resumes communication.

2. The isolating electromagnetic valve according to claim 1, characterized by The utility model further comprises a positioning pin (6) connected to the opposite end faces of the fixed core (22) and the moving core (23), the reset spring (3) being sleeved on the positioning pin (6).

3. The isolating electromagnetic valve according to claim 2, characterized by The utility model further comprises a positioning ring (7) threadedly connected to the inside of the core shell (21), the positioning ring (7) cooperating with the positioning pin (6) to ensure that the moving core (23) is always in the axial position inside the core shell (21).

4. The isolating electromagnetic valve according to claim 1, characterized by The moving core (23) has an annular groove (231) on the outside, the annular groove (231) being adapted to the shape of the upper end of the moving block (4), the upper end of the moving block (4) being clamped into the annular groove (231), the moving block (4) being driven to move laterally by the annular groove (231) of the moving core (23).

5. The isolating electromagnetic valve according to claim 4, characterized by The middle section of the moving block (4) has a protrusion (41) extending outward, the protrusion (41) being clamped into the assembly groove (141) of the valve body upper cover (14), the protrusion (41) and the assembly groove (141) together constituting the fulcrum of the moving block (4).

6. The isolating electromagnetic valve according to claim 1, characterized by The upper part of the soft isolation sleeve (5) has an annular hanging edge (51), the annular hanging edge (51) being in interference fit with the hanging table (142) of the valve body upper cover (14) to form static sealing, the lower part of the soft isolation sleeve (5) being adapted to the shape of the lower end of the moving block (4).

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